4. The success of the low-ball technique is attributed to which
psychological principle?

A Commitment because once an individual commits to one
request, they are likely to commit to almost anything
B Commitment because once an individual commits to one
request, they are more likely to commit to a similar request even
if the details are altered
C Reciprocity because once an individual does someone a favor,
they know they owe the other person a favor back
D Reciprocity because once a person is close to accepting a fair
deal, it's only fair that they should agree to a similar deal, even if
some of the details are changed